* {
  margin: 0;
  padding: 0;
}
html,
body {
  height: 100%;
  width: 100%;
}
#mainCanvasBox {
  width: 100%;
  height: 100%;
  overflow: hidden;
}
#mainCanvas,
#startPage {
  width: 100%;
  height: 100%;
  position: absolute;
}
#startPage {
  background-image: url("../img/bg_gs.png");
  background-size: 100% 100%;
}
#logo {
  position: absolute;
  width: 70%;
  top: 15%;
  left: 15%;
}
#loading,
#start {
  font-family: "微软雅黑", "黑体", "幼圆", "Adobe Arabic";
  position: absolute;
  bottom: 15%;
  width: 30%;
  left: 35%;
  color: aliceblue;
  text-align: center;
  font-size: 20pt;
}
#start img {
  position: relative;
  margin-top: -4%;
  width: 60%;
}
